# SDR P5CA2025100300092

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 3, 2025
- Submitted: October 6, 2025
- Operation: Air carrier
- Aircraft: [N858GT](https://openairdocs.org/aircraft/N858GT), registered now
- Make and model: Boeing 747-87UF
- Registry model: [Boeing 747-87UF](https://openairdocs.org/model/boeing-747-87uf) (OpenAirDocs)
- Aircraft serial: 37569
- Aircraft time: 59,144 hours, 9,208 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: BP573
- Part serial: 57447
- Condition: No Test
- Location: Zone 200
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/P5CA2025100300092

## Discrepancy

FOUND EMERGENCY LIGHT BATTERY (M5169) FUNCTION FAIL AND CAN NOT RE-CHARGE.(<P>REPLACED POWER SUPPLY ASSY AND PERFORM POWER SUPPLY INSTALLATION TEST IAW AMM 33-51-04-000-803, AMM 33-51-04-400-803 AND AMM 33-51-04-900-803 REV 48A. THE RESULT WAS SATISFACTORY.</P>)

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